Birdies 740mm Garden Bed 1.6 sqm (1.6m x 1m) but using sq feet cause it more accurate rather than 1sqm or 2sqm

Filled with a worm casting mix I bought

https://www.bunnings.com.au/birdies-740mm-slate-grey-9-in-1-modular-raised-garden-bed_p3321557